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<h1 class="title">size QML基本类型</h1>
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<p>具有宽度和高度属性的值</p>
<p><code>size</code> 类型是指具有<code>width</code> 和<code>height</code> 属性的值。</p>
<p>例如，要读取<a href="../qtquick/qml-qtquick-image.html#sourceSize-prop">Image::sourceSize</a>大小类型属性的<code>width</code> 
和<code>height</code> 值:</p>
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  <span class="type"><a href="../qtquick/qml-qtquick-column.html">Column</a></span> {
      <span class="type"><a href="../qtquick/qml-qtquick-image.html">Image</a></span> { <span class="name">id</span>: <span class="name">image</span>; <span class="name">source</span>: <span class="string">&quot;logo.png&quot;</span> }
      <span class="type"><a href="../qtquick/qml-qtquick-text.html">Text</a></span> { <span class="name">text</span>: <span class="name">image</span>.<span class="name">sourceSize</span>.<span class="name">width</span> <span class="operator">+</span> <span class="string">&quot;,&quot;</span> <span class="operator">+</span> <span class="name">image</span>.<span class="name">sourceSize</span>.<span class="name">height</span> }
  }

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<p>要创建一个<code>size</code> 值，指定它为“width x height”字符串:</p>
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  <span class="type"><a href="../qtquick/qml-qtquick-image.html">Image</a></span> { <span class="name">sourceSize</span>: <span class="string">&quot;150x50&quot;</span> }

</pre>
<p>或者使用<a href="qml-qtqml-qt.html#size-method">Qt.size()</a>函数:</p>
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  <span class="type"><a href="../qtquick/qml-qtquick-image.html">Image</a></span> { <span class="name">sourceSize</span>: <span class="name">Qt</span>.<span class="name">size</span>(<span class="number">150</span>, <span class="number">50</span>) }

</pre>
<p>当与C++集成时，请注意任何从<a href="qtqml-cppintegration-data.html">C++传递到QML</a>的<a href="../qtcore/qsize.html">QSize</a>或<a href="../qtcore/qsizef.html">QSizeF</a>值都会自动转换为<code>size</code> 
值，反之亦然。当一个<code>size</code>值传递给C++时，它会自动转换为<a href="../qtcore/qsizef.html">QSizeF</a>值。</p>
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<p><b>请参考 </b><a href="qtqml-typesystem-basictypes.html">QML基本类型</a><span lang="zh-cn">。</span></p>
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